//example sketch to run the LEDs
int serialIn = 34;
int registerClk = 36;
int serialClk = 38;
int serialClr = 40;

void setup(){
  //setting the mode of the pins
  pinMode(serialIn, OUTPUT);
  pinMode(registerClk, OUTPUT);
  pinMode(serialClk, OUTPUT);
  pinMode(serialClr, OUTPUT);
  
  //setting the initial pin values
  digitalWrite(serialIn, LOW);
  digitalWrite(registerClk, LOW);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialClr, LOW);

  //clearing out the registers
  digitalWrite(registerClk, HIGH);
  digitalWrite(registerClk, LOW);
  digitalWrite(serialClr, HIGH);
}//end of setup

void loop(){
  //lighting up every other LED starting with the first one
  digitalWrite(registerClk, LOW);
  
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  
  digitalWrite(registerClk, HIGH);
  delay(500);
  //lighting up every other LED starting with the second one
  digitalWrite(registerClk, LOW);
  
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, LOW);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  digitalWrite(serialIn, HIGH);
  digitalWrite(serialClk, HIGH);
  digitalWrite(serialClk, LOW);
  
  digitalWrite(registerClk, HIGH);
  delay(500);
}//end of loop